package com.nowcoder.community.controller;/**
 * @description:
 * @Author HP
 * @create 2021/12/14 9:04
 */

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author HP
 * @create 2021-12-14 9:04
 * @desc 登录的controller层
 **/
@Controller
public class LoginController implements CommunityConstant {

    @Autowired
    private UserService userService;

    @Autowired
    private Producer kaptchaProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    private final Logger logger=LoggerFactory.getLogger(LoginController.class);

    @RequestMapping(path = "/register",method = RequestMethod.GET)
    public String getRegisterPage(){
        return "/site/register";
    }

    @RequestMapping(path = "/login",method = RequestMethod.GET)
    public String getLoginPage(){
        return "/site/login";
    }

    @RequestMapping(path = "/register",method = RequestMethod.POST)
    public String register(Model model, User user){
        Map<String,Object> map=userService.register(user);
        if(map==null|| map.isEmpty()){
            model.addAttribute("msg","注册成功，我们已经向您的邮箱发送了一封激活邮件，请尽快激活!");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else{
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            model.addAttribute("emailMsg",map.get("emailMsg"));
            return "/site/register";
        }
    }

    @RequestMapping(path = "/activation/{userId}/{code}",method = RequestMethod.GET)
    public String activation(Model model, @PathVariable("userId")int userId,@PathVariable("code")String code){
        int result=userService.activation(userId,code);
        if (result==ACTIVATION_SUCCESS){
            model.addAttribute("msg","激活成功，您的账号已经可以正常使用了！");
            model.addAttribute("target","/login");
        }else if (result==ACTIVATION_REPEAT){
            model.addAttribute("msg","无效操作，该账号已经激活过了！");
            model.addAttribute("target","/index");
        }else {
            model.addAttribute("msg","激活失败，您提供的激活码不正确！");
            model.addAttribute("target","/index");
        }
        return "/site/operate-result";
    }

    @RequestMapping(path = "/kaptcha",method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response/*, HttpSession session*/){
        String text= kaptchaProducer.createText();
        BufferedImage img= kaptchaProducer.createImage(text);

        // 将验证码存入session
        //session.setAttribute("kaptcha",text);

        // 验证码的归属
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner", kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        // 将验证码存入Redis
        String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(redisKey, text, 60, TimeUnit.SECONDS);

        // 将图片输出给浏览器
        response.setContentType("image/png");

        try {
            OutputStream os= response.getOutputStream();
            ImageIO.write(img,"png",os);
        } catch (IOException e) {
            logger.error("响应验证码失败："+e.getMessage());
        }
    }

    @RequestMapping(path = "/login",method = RequestMethod.POST)
    public String login(String username,String password,String code,boolean rememberme,
                        Model model,HttpServletResponse response,/*,HttpSession session*/
                        @CookieValue("kaptchaOwner") String kaptchaOwner){
        //判断验证码
        //String kaptcha= (String) session.getAttribute("kaptcha");
        String kaptcha = null;
        if (StringUtils.isNotBlank(kaptchaOwner)) {
            String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(redisKey);
        }

        if (StringUtils.isBlank(kaptcha)||StringUtils.isBlank(code)||!kaptcha.equalsIgnoreCase(code)){
            model.addAttribute("codeMsg","验证码不正确");
            return "/site/login";
        }

        //检查账号密码
        int expiredSeconds=rememberme?REMEMBERME_EXPIRED_SECOND:DEFAULT_EXPIRED_SECOND;
        Map<String,Object>map=userService.login(username,password,expiredSeconds);
        if(map.containsKey("ticket")){
            Cookie cookie=new Cookie("ticket",map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        }else {
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            return "/site/login";
        }
    }

    @RequestMapping(path = "/logout",method = RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        SecurityContextHolder.clearContext();
        return "redirect:/login";
    }

}
